Performance parts unlock at set mileage intervals:
| Category | 500 mi | 1000 mi | 1500 mi | 2000 mi |
|---|---|---|---|---|
| Turbo | Turbo | Twin Turbo | Triple Turbo | Stage 4 Turbo |
| Engine Block | Stage 1 | Stage 2 | Stage 3 | Stage 4 |
| Transmission | Stage 1 | Stage 2 | Stage 3 | Stage 4 |
| Body | Front Bumper | Side Skirts | Rear Bumper | Hood |
| Wheels | Stage 1 | Stage 2 | Stage 3 | Stage 4 |
“King of the Road” parts unlock via special challenges.